The technology behind NoMachine 4 and later is released under a closed source license with the exception of some components that we release as open source software or as contributions to other OSS projects. Please consult the download section of the website to see what we make available:

When including Open Source software in our project we strictly follow the licensing terms of the original copyright holders (GPL, LGPL, BSD, etc.) and make this information available for perusal in the 'credits' file accompanying the software.